News tagged with cells
Common therapies for basal cell carcinoma offer similar survival
(HealthDay) -- For patients with superficial basal cell carcinoma (sBCC), treatment with imiquimod or photodynamic therapy (PDT) results in similar long-term tumor-free survival, according to a review published ...
Cancer
May 25, 2012 |
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Cancer may require simpler genetic mutations than previously thought
Chromosomal deletions in DNA often involve just one of two gene copies inherited from either parent. But scientists haven't known how a deletion in one gene from one parent, called a "hemizygous" deletion, can contribute ...
Cancer
May 25, 2012 |
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Energy levels link sleep control mechanisms
Sleep, or lack of it, can determine level of cognitive performance which is linked with accidents as well as increased risk of serious health problems. Links between cell energy levels, gene transcription ...
Medical research
May 25, 2012 |
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Researchers identify key brain cell in antidepressant action
(Medical Xpress) -- Antidepressant medications such as Prozac have helped improve mood and lessen anxiety in millions of people with major depression. But scientists know surprisingly little about how these drugs work.
Medical research
May 25, 2012 |
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Amino acid consumption associated with how fast cancer cells divide
For almost a century, researchers have known that cancer cells have peculiar appetites, devouring glucose in ways that normal cells do not. But glucose uptake may tell only part of cancer's metabolic story. Researchers from ...
Cancer
May 24, 2012 |
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The cells' petrol pump is finally identified
The oxygen and food we consume are converted into energy by tiny organelles present in each cell, the mitochondria. These 'power plants' must be continuously supplied with fuel, to maintain all vital functions. A team led ...
Medical research
May 24, 2012 |
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Boundary stops molecule right where it needs to be
A molecule responsible for the proper formation of a key portion of the nervous system finds its way to the proper place not because it is actively recruited, but instead because it can't go anywhere else.
Neuroscience
May 24, 2012 |
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Locating ground zero: How the brain's emergency workers find the disaster area
Like emergency workers rushing to a disaster scene, cells called microglia speed to places where the brain has been injured, to contain the damage by 'eating up' any cellular debris and dead or dying neurons. ...
Neuroscience
May 24, 2012 |
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Marked for destruction: Newly developed compound triggers cancer cell death
The BCL-2 protein family plays a large role in determining whether cancer cells survive in response to therapy or undergo a form of cell death known as apoptosis. Cells are pressured toward apoptosis by expression of pro-apoptotic ...
Cancer
May 24, 2012 |
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Gene therapy can correct forms of severe combined immunodeficiency
Severe combined immunodeficiency is defect in the immune system that results in a loss of the adaptive immune cells known as B cells and T cells. Mutations in several different genes can lead to the development of severe ...
Immunology
May 24, 2012 |
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Thioridazine kills cancer stem cells in human while avoiding toxic side-effects of conventional cancer treatments
A team of scientists at McMaster University has discovered a drug, thioridazine, successfully kills cancer stem cells in the human while avoiding the toxic side-effects of conventional cancer treatments.
Cancer
May 24, 2012 |
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From stem cell to brain cell - new technique mimics the brain
A new technique that converts stem cells into brain cells has been developed by researchers at Lund University. The method is simpler, quicker and safer than previous research has shown and opens the doors to a shorter route ...
Medical research
May 24, 2012 |
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Research team uncovers mechanism behind drugs that cause altered immunity
(Medical Xpress) -- An Australian research team has opened the door to understanding why certain drugs cause a so called altered immunity response when offered as treatment for certain specific ailments. In their paper published ...
Immunology
May 24, 2012 |
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No new neurons in the human olfactory bulb
(Medical Xpress) -- Research from Karolinska Institutet shows that the human olfactory bulb - a structure in the brain that processes sensory input from the nose - differs from that of other mammals in that no new neurons ...
Neuroscience
May 24, 2012 |
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Whole genome sequencing of rare olfactory neuroblastoma
The Translational Genomics Research Institute (TGen) and the Virginia G. Piper Cancer Center at Scottsdale Healthcare have conducted whole genome sequencing (WGS) of a rare nasal tract cancer called olfactory neuroblastoma ...
Genetics
May 23, 2012 |
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Cell (biology)
The cell is the structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as living, and is often called the building block of life. Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 1014 cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.
In 1835 before the final cell theory was developed, a Czech Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells. All cells come from preexisting cells. Vital functions of an organism occur within cells, and all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.
The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.
For more information about Cell (biology), read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
